osobhandClaude Opus 5.5
bdf584abb2
A Fixed or Extensible Array index whose maximum extent (the current one when no maximum is recorded) is 0 along a dimension has a zero stride for every dimension before it; ChunkGrid::offsets divided by it. The unfixed editor made such files by resizing a clawhdf5-written dataset to a zero extent: `h5rs check` panicked and the next resize raised an internal error (12 of the reviewer's random-edit seeds 10..39). Such an index has no slot for any chunk of the dataset; offsets now returns None. Tests: chunk_grid::zero_extent_has_no_chunks; edit_interop's zero_extent_resizes_without_a_recorded_maximum on a file the unfixed editor left (fixture) and on a 2.7.0-written file taken through zero extents with `h5rs check --data` and h5dump at every step; test_edit.py random edits on seeds 10..39 of a clawhdf5-written file. Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
clawhdf5-format
Pure-Rust HDF5 binary format parsing and writing — no C dependencies.
Features
- Zero-copy superblock, object header, and B-tree parsing
- Chunked dataset read/write with filter pipelines
no_stdsupport (disablestdfeature)- Optional parallel reads via Rayon
- SHA-256 provenance tracking
Usage
use clawhdf5_format::Superblock;
let data = std::fs::read("data.h5").unwrap();
let sb = Superblock::from_bytes(&data).unwrap();
println!("HDF5 version {}.{}", sb.version_major(), sb.version_minor());
License
MIT